Classifications

• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
  • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
  • B29C59/00—Surface shaping of articles, e.g. embossing; Apparatus therefor
  • B29C59/14—Surface shaping of articles, e.g. embossing; Apparatus therefor by plasma treatment
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
  • B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
  • B41M5/00—Duplicating or marking methods; Sheet materials for use therein
  • B41M5/0011—Pre-treatment or treatment during printing of the recording material, e.g. heating, irradiating
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
  • B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
  • B41M5/00—Duplicating or marking methods; Sheet materials for use therein
  • B41M5/0041—Digital printing on surfaces other than ordinary paper
  • B41M5/0047—Digital printing on surfaces other than ordinary paper by ink-jet printing
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
  • B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
  • B41M5/00—Duplicating or marking methods; Sheet materials for use therein
  • B41M5/0041—Digital printing on surfaces other than ordinary paper
  • B41M5/0064—Digital printing on surfaces other than ordinary paper on plastics, horn, rubber, or other organic polymers
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B44—DECORATIVE ARTS
  • B44C—PRODUCING DECORATIVE EFFECTS; MOSAICS; TARSIA WORK; PAPERHANGING
  • B44C5/00—Processes for producing special ornamental bodies
  • B44C5/04—Ornamental plaques, e.g. decorative panels, decorative veneers
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B44—DECORATIVE ARTS
  • B44C—PRODUCING DECORATIVE EFFECTS; MOSAICS; TARSIA WORK; PAPERHANGING
  • B44C5/00—Processes for producing special ornamental bodies
  • B44C5/04—Ornamental plaques, e.g. decorative panels, decorative veneers
  • B44C5/0469—Ornamental plaques, e.g. decorative panels, decorative veneers comprising a decorative sheet and a core formed by one or more resin impregnated sheets of paper
  • B44C5/0476—Ornamental plaques, e.g. decorative panels, decorative veneers comprising a decorative sheet and a core formed by one or more resin impregnated sheets of paper with abrasion resistant properties
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B44—DECORATIVE ARTS
  • B44F—SPECIAL DESIGNS OR PICTURES
  • B44F9/00—Designs imitating natural patterns
  • B44F9/02—Designs imitating natural patterns wood grain effects
• • E—FIXED CONSTRUCTIONS
  • E04—BUILDING
  • E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
  • E04C2/00—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels
  • E04C2/30—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by the shape or structure
• • E—FIXED CONSTRUCTIONS
  • E04—BUILDING
  • E04F—FINISHING WORK ON BUILDINGS, e.g. STAIRS, FLOORS
  • E04F15/00—Flooring
  • E04F15/02—Flooring or floor layers composed of a number of similar elements
  • E04F15/02194—Flooring consisting of a number of elements carried by a non-rollable common support plate or grid
• • E—FIXED CONSTRUCTIONS
  • E04—BUILDING
  • E04F—FINISHING WORK ON BUILDINGS, e.g. STAIRS, FLOORS
  • E04F15/00—Flooring
  • E04F15/02—Flooring or floor layers composed of a number of similar elements
  • E04F15/10—Flooring or floor layers composed of a number of similar elements of other materials, e.g. fibrous or chipped materials, organic plastics, magnesite tiles, hardboard, or with a top layer of other materials
  • E04F15/105—Flooring or floor layers composed of a number of similar elements of other materials, e.g. fibrous or chipped materials, organic plastics, magnesite tiles, hardboard, or with a top layer of other materials of organic plastics with or without reinforcements or filling materials
• • E—FIXED CONSTRUCTIONS
  • E04—BUILDING
  • E04F—FINISHING WORK ON BUILDINGS, e.g. STAIRS, FLOORS
  • E04F15/00—Flooring
  • E04F15/02—Flooring or floor layers composed of a number of similar elements
  • E04F15/10—Flooring or floor layers composed of a number of similar elements of other materials, e.g. fibrous or chipped materials, organic plastics, magnesite tiles, hardboard, or with a top layer of other materials
  • E04F15/107—Flooring or floor layers composed of a number of similar elements of other materials, e.g. fibrous or chipped materials, organic plastics, magnesite tiles, hardboard, or with a top layer of other materials composed of several layers, e.g. sandwich panels
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
  • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
  • B05D3/00—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials
  • B05D3/14—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials by electrical means
  • B05D3/141—Plasma treatment
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
  • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
  • B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
  • B05D7/06—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials to wood
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
  • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
  • B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
  • B05D7/50—Multilayers
  • B05D7/52—Two layers
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
  • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
  • B29K2033/00—Use of polymers of unsaturated acids or derivatives thereof as moulding material
  • B29K2033/18—Polymers of nitriles
  • B29K2033/20—PAN, i.e. polyacrylonitrile
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
  • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
  • B29L2031/00—Other particular articles
  • B29L2031/722—Decorative or ornamental articles
• • E—FIXED CONSTRUCTIONS
  • E04—BUILDING
  • E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
  • E04C2/00—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels
  • E04C2002/005—Appearance of panels
• • E—FIXED CONSTRUCTIONS
  • E04—BUILDING
  • E04F—FINISHING WORK ON BUILDINGS, e.g. STAIRS, FLOORS
  • E04F15/00—Flooring
  • E04F15/02—Flooring or floor layers composed of a number of similar elements
  • E04F15/10—Flooring or floor layers composed of a number of similar elements of other materials, e.g. fibrous or chipped materials, organic plastics, magnesite tiles, hardboard, or with a top layer of other materials
  • E04F15/102—Flooring or floor layers composed of a number of similar elements of other materials, e.g. fibrous or chipped materials, organic plastics, magnesite tiles, hardboard, or with a top layer of other materials of fibrous or chipped materials, e.g. bonded with synthetic resins
• • E—FIXED CONSTRUCTIONS
  • E04—BUILDING
  • E04F—FINISHING WORK ON BUILDINGS, e.g. STAIRS, FLOORS
  • E04F15/00—Flooring
  • E04F15/18—Separately-laid insulating layers; Other additional insulating measures; Floating floors
  • E04F15/20—Separately-laid insulating layers; Other additional insulating measures; Floating floors for sound insulation
  • E04F15/206—Layered panels for sound insulation
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
  • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
  • Y10T428/00—Stock material or miscellaneous articles
  • Y10T428/24—Structurally defined web or sheet [e.g., overall dimension, etc.]
  • Y10T428/24802—Discontinuous or differential coating, impregnation or bond [e.g., artwork, printing, retouched photograph, etc.]

Definitions

• the present invention relates to panels, in particular wall, ceiling or floor panels, which are provided with a printed decor, and a method for printing such panels or plates.
• Wood material such as MDF or HDF
• a resin-impregnated, printed decor paper is applied.
• a so-called overlay paper is usually applied over the decorative paper in order to improve the durability of the upper layer.
• the papers used are impregnated with resins, such as amino resins, which cure by compression under the action of heat and pressure. To the abrasion resistance of the
• the resins are often used to increase surfaces
• Abrasion-resistant particles, in particular corundum provided.
• direct-printed panels have been developed.
• these direct printed panels usually no papers are used, in particular no decorative paper. Rather, the decorative layer is printed directly onto the surface of the panel using disperse dyes by gravure printing.
• the surface is suitably pretreated, in particular ground and provided with a suitable primer, which is applied over rollers. After printing and drying the decorative layer are then several
• Polymer layers (based for example on polymerizable
• the resin layers serve as a protective layer and abrasion-resistant surface, which also usually abrasion-resistant particles are embedded with it.
• the two wet-in-wet coated layers are then cured together with the cured resulting layer having a hardness gradient due to the partial mixing, with the hardness of the coating decreasing with increasing depth from the surface of the resulting coating.
• the present invention has the object to improve the prior art, and in particular to provide a printed panel having a particularly high quality print image, and a method to provide such an improved printed image.
• the object is to provide a plate and a method in which the adhesive strength of the various layers is increased and therefore has particularly good mechanical resistance values.
• a panel according to the invention comprises a carrier plate which is provided with a decorative layer.
• a support plate are in particular
• Wood-based panels preferred, such as MDF (medium density
• the decorative layer may comprise a decor paper, which with the
• dpi value is known to the person skilled in the art and denotes the number of color dots per inch (dots).
• the dpi value is valid in at least one direction (ie, horizontal or vertical), but it is preferable that the dpi value of 200-1,200 be in both the horizontal and vertical directions of the decoration. It has surprisingly been found that in digital four-color printing, the choice of the invention for the
• Four-color digital printing usually uses the four basic colors cyan, magenta, yellow and black. Each color point of the printed image is formed by one of these four printing inks. From the four colors of four-color printing, almost any color impression can be created by varying the number of different color points on a surface. Under very strong microscope magnification, the individual color points can still be distinguished. For the human eye, however, the individual color points are not perceptible, but it creates a flat color impression. This will be explained in more detail below with reference to the figures
• the color dots have a size of 2. ⁇ 2 to
• dpi value a value of 280-1,200 is generally preferred, and more preferably 300-400.
• the dpi value should be at least in one direction (ie, horizontal or vertical), but is preferably in both (vertical and horizontal) ) Direction.
• the present invention also relates to a method for printing on plates, in particular of wall, ceiling or floor panels.
• a plate such as the wood-based panels mentioned above.
• On the plate after it has been optionally pretreated, for example, by applying a putty, grinding and applying an adhesive primer, applied a primer.
• the application of the primer is preferably carried out by means of a curtain coating process, i. by means of a liquid curtain of coating material through which the plate is passed. After an optional dry and / or
• the surface of the primer is treated by at least one of the following: a corona treatment; a plasma treatment and / or most preferably by the application of an oil.
• a decorative decoration is then printed on the plate.
• the primer is based on an aqueous dispersion (preferably an aqueous acrylate system) which is a suitable one Composition, so that they by means of a
• roller application method applied to the surface of the carrier layer is the
• Coating material discharged directly from the roller on the surfaces to be coated or indirectly via a coating tape by means of a press roll on the zu
• Roller application method uses a curtain coating process. It is believed that the rollers are at
• roller application method whether the coating material is applied directly from the roller to the surface to be coated or indirectly, via a coating tape, due to their rounding in the transferred coating produce a minimal waviness of the surface.
• the mountains and valleys of this undulating surface are so small that the surfaces thus produced with conventional
• curtain coating method and corresponding system are previously known to those skilled in the art (for example, from EP 1 252 937 Ai), so that a detailed description of the same can be dispensed with here. It is important that at
• Coating material is produced, through which the components to be coated are guided. An order for rolls does not take place.
• a dispersion is used as coating material for the primer, in particular an aqueous acrylate dispersion.
• Aqueous acrylate dispersions consist essentially of a solvent (namely water) and binder in the form of
• Plastic polymers (acrylates), which evaporate during evaporation of the
• the inventors have surprisingly found that the printed image of a printed decoration can be improved if the primer, after optional further intermediate treatment steps, is subjected to a special surface treatment.
• a suitable treatment of the surface is the so-called corona treatment.
• the corona treatment is an electrochemical process for
• corona treatment Surface modification of particular plastics, and the principles of corona treatment are known from the prior art, so that a detailed explanation is omitted here.
• Important in the corona treatment is only that one or more high voltage electrodes are used, which are arranged at a distance of a few millimeters to the treated surfaces are. Will the surface on the high voltage electrodes
• a plasma treatment of the surfaces can be carried out. Also plasma method for
• Plasma state is transferred.
• the process gas such as air, is directed through the nozzle head onto the surface of the material to be treated.
• Plasma discharge causes a significant improvement is the
• an oil preferably in aqueous dilution
• an oil particularly high-quality printed images can be produced without the need for expensive equipment plasma or corona treatment. It is believed that the fatty acids of the oil adhere well to the polar groups of the foundry base material and thereby the
• Fatty acids leads to particularly good results. On the one hand, a high proportion of unsaturated fatty acids improves the visual impression of the On the other hand, unsaturated fatty acids in the print image
• the oil should preferably have a high weight fraction of unsaturated fatty acids, more preferably at least 20%, preferably at least 30%, more preferably at least 50% and most preferably at least 80%.
• oil emulsion can also other compounds
• an aliphatic polyurethane acrylate is applied to the primer in an amount of 1 to 20 g / m 2 , preferably 3 to 6 g / m 2 , digitally printed thereon and the further oligomer structure applied as described.
• the polyurethane acrylate is attached on the one hand via hydrogen bonds to the acrylate matrix of the primer and on the other hand via double bonds in the
• Polymer network consisting of this polyurethane acrylate, the polymerizable inks and the following
• Printed images are compounds that have three essentials: functional groups that are linked to the secondary valency bonds
• Primer can be anchored; have an apolar backbone, which is matched in polarity to the polarity of the ink and double bonds, which are incorporated in the polymer layer in the radiation-curing polymerization.
• apolar backbone which is matched in polarity to the polarity of the ink and double bonds, which are incorporated in the polymer layer in the radiation-curing polymerization.
• at least these compounds must have two features: functional groups that are sufficiently anchored via minor valence bonds and an apolar backbone that provides the appropriate polarity to match the printing ink.
• oil / m 2 should be applied, more preferably 1.0 to 5 g / m 2 , more preferably 1.5 to 3 gm 2, and most preferably 1.6 to 2.5 g Oil / m 2 to be coated surface.
• the application of the desired amount of oil is best metered when the oil is applied in aqueous dilution.
• the aqueous dilution should preferably be divided by parts by weight in such a way that one part of oil contains 1 to 30 parts of water.
• the decor is printed by means of digital printing and more preferably by means of a digital four-color printing, as described above.
• the above information on the average size of the color dots, the dpi value and so on can be advantageously used in the inventive method.
• the panels or panels above the decorative layer or the decor comprise a cured polymer layer as a wear layer, which preferably has a hardness gradient, according to the above-mentioned WO 2008/061791.
• the polymer layer is preferably applied in the form of a polymerizable acrylate system, and comprises for example, 1,6-hexanediol diacrylate, polyester acrylate, polyurethane acrylic acid ester and diprophylline glycol diacrylate.
• Preferred thicknesses for the polymer layer (useful layer) after curing are 20 to 300 ⁇ m, more preferably 40 to 250 ⁇ m, even more preferably 50 to 22 ⁇ m and most preferably 60 to 100 ⁇ m. Under curing of a polymer layer, or a polymerizable
• Acrylate system is understood here as the chemical reaction that takes place in the polymerization, in particular a polycondensation. To distinguish this is the drying of such layers, in which only the solvent, such as the water content of
• Polymer layers evaporated or reduced in a purely physical way.
• the application of the polymer layer takes place after printing the decorative decoration on the surface of the plate, or the panel.
• further processing and processing steps may be performed, such as the application of a primer or the like.
• the applied polymer layer preferably has a hardness gradient, so that the hardness of the polymer layer increases with increasing depth from the surface of the polymer layer
• such a hardness gradient can be adjusted by applying a first liquid coating agent (first oligomer) to the surface in a first step, and at least a second liquid coating agent (second oligomer) to the still moist first coating agent in a second step. Applying wet-on-wet results in partial mixing at the interface.
• the coating agent or the two applied coating compositions are preferably cured together by means of radiation.
• the two bonded materials for the first and second layer should be different and in particular have a different proportion of CC double bonds, so that after hardening due to partial mixing
• the printing ink used is based on a polymerizable acrylate.
• emulsion paints are used as the printing ink (ink), in particular acrylic paints. These emulsion paints are regularly used in the gravure printing process commonly used.
• Emulsion paints are printing inks, which usually consist of three main constituents, namely (a) a solvent (usually water today), (b) binders in the form of plastic polymers (acrylates), which evaporate upon evaporation of the
• the conventionally used dispersion inks have no polymerizable acrylate systems, so that no such chemical crosslinking between printing ink and the polymer layer can take place.
• the preferred polymerizable printing inks are in particular polymerizable acrylate systems.
• Polymerizable printing inks contain as main components binders, namely reactive double bonds contained resins, ie monomers or
• Oligomers such as acrylate monomers and acrylate oligomers; optional photo-initiators for radiation-curable printing inks, and in addition additives such as defoamers, leveling additives, thickeners and color pigments to a small extent.
• the polymerizable inks used for the present invention are radiation-curable, in particular UV-curable (UV-curable) inks. Therefore, in a particularly preferred embodiment of the invention, the printing question used is a UV-curable polymerizable acrylate system.
• no UV-curable lacquer should be used as the coating agent for the primer.
• the adhesion of such paints can be impaired.
• a plate HDF carrier plate with a thickness of 8mm is first provided on a roll applicator with a primer based on a commercially available aqueous acrylate dispersion. Then the plate is smoothed using a putty. To Predrying will be a primer over
• the primer is based on an aqueous acrylate dispersion mixed with fillers and color pigments. After each of these coating steps takes place
• a rapeseed oil is applied to the primer via a roller applicator in eightfold aqueous dilution. The amount applied is adjusted so that about 2 g (pure) rapeseed oil per m 2 surface are applied.
• a decorative image is printed by means of a digital printer. For this purpose, UV-curable digital inks are used, with a color amount of about 2g / m 2 are needed.
• a polymer layer is applied, in the form of a double-bond-containing, photo-initiator-curable radiation curable oligomer.
• a second polymer layer of a double-bond-containing curable oligomer which is provided with photo-initiators, is applied, so that the two layers can partially intermix at their boundary surfaces.
• all three layers, ie the polymerizable ink, the first polymer layer and the second polymer layer are polymerized together by means of UV radiation, ie cured.
• the thus finished coated plate can then be divided into further processes in panels, which can be provided with known coupling elements, so that several panels can be combined to form a floor.
• Fig. 1 is a microscope photograph of a printed image according to the prior art
• Fig. 2 is a microscope image of a printed image
• Fig. 3 is a microscope photograph of a printed image
• Fig. 4 is a microscope image of a printed image with
• Fig. 6 shows a plant for carrying out the invention
• FIGS. 1-4 Various microscopic enlargements of four-color digital printing images are shown in FIGS. 1-4.
• the enlargements are taken from the printed image of a real wood decor.
• the decor is formed from a variety of color dots.
• the color dots are discrete, separate points.
• Figures 1 - 4 are held in black and white, but it can be seen in principle that the size and the course of the individual color dots in varies the figures.
• Fig. 1 a four-color digital printing image according to the prior art is shown. The digital print was applied immediately after application of the primer. The individual color points are clearly separated from each other, as is actually the case with this one
• FIG. 2 shows a microscopic enlargement print image in which the primer was subjected to a corona treatment prior to printing. As can be seen from FIG. 2, the individual color dots are somewhat stronger and thus cover more of the surface. Similarly good results can be achieved with a plasma treatment, as can be seen in FIG.
• FIG. 5 shows a schematic layer construction for a panel according to the invention.
• the representation is purely schematic and not to scale.
• the actual carrier plate 11 is considerably thicker than the remaining layers 12-16, which are in the range of a few ⁇ m.
• the carrier plate 11 shown is an HDF plate with about 8mm stronger.
• a soundproofing layer 17 At the bottom of the support plate 11 is a soundproofing layer 17 and a mounted thereon
• Moisture protection layer 18 On the top, i. one
• the primer 12 Main surface of the plate, the primer 12 is applied.
• a decorative layer or a decor 13 is provided on the primer 12.
• the decor 13 was applied by means of a polymerizable ink in digital four-color printing.
• Above the decorative layer 13 are two polymer layers, which represent the actual wear layer of the panel 10.
• the polymer layers 14 and 15 are based on a
• the polymer layers may be provided with abrasion-resistant particles, in particular corundum, as is known to the person skilled in the art.
• an oil was applied to the primer 12 in aqueous emulsion, forming an oil layer 20.
• FIG. 6 schematically shows a coating installation for coating panels 10.
• the panels 10, which may be, for example, solid wood panels, MDF, HDF or chipboard, are conveyed through a roller conveyor 21
• the illustrated coating stations are not meant to be exhaustive, but are only illustrative of the explanation of the method according to the invention.
• further processing stations may be provided, such as further drying stations, priming stations, filling stations, etc.
• the primer is applied by means of a liquid curtain 31 of coating material
• the liquid curtain 31 extends over the entire plate width and the plates are transported through this curtain and thereby coated.
• a collection container 32 into which the liquid curtain falls when no plate is passed through the curtain, such as at the gap between two successive plates.
• Coating material for the primer is preferably used an aqueous acrylate dispersion.
• the applied primer is dried with hot air, ie the water is removed from the aqueous acrylate dispersion.
• an oil is applied to the primer by rolling in aqueous dilution.
• the oil is preferably a natural oil such as linseed oil, palm oil, sunflower oil or rapeseed oil and is applied in an amount of 1-5 g of oil / m 2 .
• a decorative decoration such as in particular a real wood decor, is printed on the primer thus treated by means of digital printing.
• a drying step may be provided between the stations 50 and 60. After printing, a polymer layer is applied in the coating station 70.
• Polymer layer is applied with a hardness gradient, so that the hardness of the polymer layer decreases substantially continuously with increasing depth from the surface of the polymer layer ago.
• a first coating unit 71 a first polymer layer based on a polymerizable acrylate system is applied.
• a further wet-on-wet polymer layer is applied to this first polymer layer.
• the second polymer layer has, for example, a higher one
• Double bond fraction as described in detail in the above-mentioned application to hardness gradient.
• Polymer layers are applied wet-on-wet in stations 71 and 72 so that partial intermixing occurs at the interface of the two layers.
• station 73 the two polymer layers are cured together under the influence of UV radiation.
• station 60 is a digital printing station and uses a printing ink based on a polymerizable acrylate. In this case, it is preferred that between the stations 60 and 70 no curing of the ink takes place, but at most one
• the application of an oil in aqueous dilution is provided at the coating station 50.
• stations for corona treatment or plasma Be provided for treatment.
• another station for corona treatment may be provided between stations 40 and 50 and the application of the oil in aqueous dilution then takes place after the corona treatment in station 50.

Landscapes

• Engineering & Computer Science (AREA)
• Architecture (AREA)
• Civil Engineering (AREA)
• Structural Engineering (AREA)
• Life Sciences & Earth Sciences (AREA)
• Wood Science & Technology (AREA)
• Physics & Mathematics (AREA)
• Plasma & Fusion (AREA)
• Laminated Bodies (AREA)
• Application Of Or Painting With Fluid Materials (AREA)
• Printing Methods (AREA)
• Ink Jet (AREA)

Priority Applications (19)

Applications Claiming Priority (1)

Related Child Applications (2)

Publications (1)

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Family Applications (1)

Country Status (14)

Cited By (1)

Families Citing this family (13)

Citations (13)

Family Cites Families (10)

• 2012
  • 2012-06-13 WO PCT/EP2012/061207 patent/WO2013185814A1/fr not_active Ceased
  • 2012-06-13 RS RS20200893A patent/RS60590B1/sr unknown
  • 2012-06-13 EP EP12730190.1A patent/EP2861432B1/fr active Active
  • 2012-06-13 DK DK15151421.3T patent/DK2891562T3/da active
  • 2012-06-13 PL PL15151421T patent/PL2891562T3/pl unknown
  • 2012-06-13 PT PT12730190T patent/PT2861432T/pt unknown
  • 2012-06-13 EP EP15151421.3A patent/EP2891562B1/fr active Active
  • 2012-06-13 ES ES12730190T patent/ES2699232T3/es active Active
  • 2012-06-13 ES ES15151421T patent/ES2808686T3/es active Active
  • 2012-06-13 RU RU2014151225/12A patent/RU2598308C2/ru active
  • 2012-06-13 HU HUE15151421A patent/HUE050057T2/hu unknown
  • 2012-06-13 CA CA2876378A patent/CA2876378C/fr active Active
  • 2012-06-13 US US14/407,274 patent/US9744716B2/en active Active
  • 2012-06-13 PL PL12730190T patent/PL2861432T3/pl unknown
  • 2012-06-13 CN CN201280074000.5A patent/CN104364089B/zh active Active
  • 2012-06-13 UA UAA201500234A patent/UA111032C2/uk unknown
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